class_docstr: real time speed stat
code: def __init__(self, sample_range=1, bucket_num=10):
      self.bucket_num = bucket_num
      self.sample_range = sample_range
      self.bucket = [0] * bucket_num
      self.bucket_sample = [0] * bucket_num
      self.bucket_ver = [0] * bucket_num
  
imports: import asyncio
  import math
  import time
  from collections import defaultdict
  from tabulate import tabulate
label_desc: Use image node_id 1 to create a new DynamicBucketMerge object  with example: obj = DynamicBucketMerge(sample_range, bucket_num)